3
strip
1
2
3
1
1
2
0
1
4
2
1
2
1
1
2
0
1
2
2
0
2
2
1
1
0
2
1
0
1
0
1
2
4
1
2
1
2
1
1
2
3
2
1
1
2
1
0
3
4
